package com.suifeng.yquest.config;

import cn.dev33.satoken.exception.SaTokenException;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.suifeng.yquest.api.common.Result;
import org.springframework.boot.web.reactive.error.ErrorWebExceptionHandler;
import org.springframework.core.io.buffer.DataBufferFactory;
import org.springframework.http.MediaType;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

@Component
public class WebExceptionHandler implements ErrorWebExceptionHandler {
    private ObjectMapper objectMapper = new ObjectMapper();
    @Override
    public Mono<Void> handle(ServerWebExchange serverWebExchange, Throwable throwable) {
            ServerHttpRequest request = serverWebExchange.getRequest();
            ServerHttpResponse response = serverWebExchange.getResponse();
            Integer code = 200;
            String message = "";
            if (throwable instanceof SaTokenException) {
                code = 401;
                message = "用户无权限";
            } else {
                code = 500;
                message = "系统繁忙";
            }
            Result result = Result.fail(code, message);
            response.getHeaders().setContentType(MediaType.APPLICATION_JSON);

            return response.writeWith(Mono.fromSupplier(() -> {
                DataBufferFactory dataBufferFactory = response.bufferFactory();
                byte[] bytes = null;
                try {
                    bytes = objectMapper.writeValueAsBytes(result);
                } catch (JsonProcessingException e) {
                    e.printStackTrace();
                }
                return dataBufferFactory.wrap(bytes);
            }));
    }
}
